Study of CPW-fed circular disc monopole antenna for ultra wideband applications

By J. Liang, Lu Guo, C. C. Chiau, Xiao Chen, C. Parini. 2005

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Compact SRR Loaded UWB Circular Monopole Antenna With Frequency Notch Characteristics (2014, background): “The antenna performance depends on the ground plane width and the feed gap , since the current is distributed along “ ” and the ground plane serves as an impedance matching circuit [17].”
A Miniaturized Elliptic-Card UWB Antenna With WLAN Band Rejection for Wireless Communications (2007, background): “Changing the width of the ground plane (W), however, changes VSWR significantly since the ground plane is a part of impedance matching circuit [14].”
Compact Disc Monopole Antennas for Current and Future Ultrawideband (UWB) Applications (2011, background): “Typical feeding techniques include simple microstrip lines [4], coplanar waveguide feeds [17], and slotted structures [18].”
A Compact Multiband Monopole Antenna With a Defected Ground Plane (2008, background): “This is because, as outlined in [8], the current on a circular disc monopole antenna is concentrated along the lower disc edge and along the upper ground plane edge, thus forming the two main radiating areas of the antenna.”